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Title varies: 3d, 1869, Preliminary field report of the United States geological survey of Colorado and New Mexico.--4th, 1870, Preliminary report of the United States geological survey of Wyoming.--5th, 1871, Preliminary report of the United States geological survey of Montana and portions of adjacent territories; being a fifth annual report of progress ... 6th-12th (1872-78) Sixth-Twelfth annual report of the United States Geological survey of the territories ...
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